PCR-generated padlock probes distinguish homologous chromosomes through quantitative fluorescence analysis

被引:10
作者
Antson, DO [1 ]
Mendel-Hartvig, M [1 ]
Landegren, U [1 ]
Nilsson, M [1 ]
机构
[1] Rudbeck Lab, Dept Genet & Pathol, Beijer Lab, SE-75185 Uppsala, Sweden
关键词
padlock probes; ligation; alpha satellite DNA; centromeres; single-nucleoticle polymorphism; genotyping;
D O I
10.1038/sj.ejhg.5200966
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Conventional cytogenetic techniques can distinguish homologous chromosomes in a qualitative manner based upon obvious morphological features or using in situ hybridization methods that yield qualitative data. We have developed a method for quantitative genotyping of single-nucleotide variants in situ using circularizable DNA probes, so-called padlock probes, targeting two different alpha satellite repeat variants present in human chromosome 7 centromeres, and a single-nucleotide variation in alpha satellite repeats on human chromosome 15 centromeres. By using these PCR-generated padlock probes, we could quantitatively distinguish homologous chromosomes and follow the transmission of the chromosomes by in situ analysis during three consecutive generations.
引用
收藏
页码:357 / 363
页数:7
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